16 th March 2016 By the end of todays lesson You will be able to Read the Roman numerals for numbers 112 Write a numbers 112 using Roman numerals Tell the time from an analogue Roman numeral clock ID: 551240
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Slide1
NL: reading Roman numerals 1-12.
16
th
March 2016Slide2
By the end of today’s lesson…
You will be able to:
Read the Roman numerals for numbers 1-12.
Write a numbers 1-12 using Roman numerals.Tell the time from an analogue Roman numeral clock.Slide3
Reading Roman numerals
Roman numerals use letters instead of our usual numbers.
Not every number has its own letter.
Combinations of these letters make up the numbers.The highest value letter must always be used.Slide4
The letters/numerals
I=1
V=5
X=10These are the only 3 letters we need for numbers up to 12.Slide5
1
ISlide6
2
II
1+1Slide7
3
III
1+1+1Slide8
4
IIII
1+1+1+1Slide9
Or… 4
IV
5-1
(1 before 5)Slide10
5
VSlide11
6
VI
5+1Slide12
7
VII
5+1+1Slide13
8
VIII
5+1+1+1Slide14
9
IX
5-1
(1 before
10)Slide15
10
XSlide16
11
XI
10+1Slide17
12
XII
10+1+1Slide18
Practise
In pairs- your partner will give you a number between 1 and 12.
On your whiteboard, write this in Roman Numerals.
Remember that:
I=1V=5X=10Slide19
Telling the time
Lots of clocks have Roman Numerals on them.
We tell the time in exactly the same way, we just have to read Roman numerals.
Click on the clock to practice…
Drag the hands on Big Ben to make a time.Slide20
16/03/2016
NL: reading Roman numerals 1-12.
Task 1- Writing Roman numerals.
Paired game- Take in turns to roll 2 dice. Add the numbers together. Find this number on the grid and write it using Roman numerals. Keep going until you have written all 12 numbers. (Roll one dice to get 1).
Stick the sheet into your books.Task 2- Reading Roman numeral clocksChoose one of the three clocks sheets. Select your challenge level: ★, ★★ or ★★★. Write the time each clock says on the sheet and stick into your books.